7 diff strains but why they all blue??

[plantsinpants]

heres the low-down,,, i dont have a camera,
i have 7 different strains outdoors, its been raining for most of the last 2 months, the tops on all 7 strains is turning purple ,,

what is causing this? ive read about lack of P
or is it the moisture stress???

they are entering flowering in a week or two
theres gotta be someone out there that can help??

 

[heathaa]

temperature is usually the reason for that the temp drops so drastically and it gives hints of blue starting at the top look at my second grow you can see a blue plant i think the pics are still there

 

[plantsinpants]

temperature is usually the reason for that the temp drops so drastically and it gives hints of blue starting at the top look at my second grow you can see a blue plant i think the pics are still there

thanks duude!! i apreciate the help